.header .navigator {
    height: 100vh;
    width: 260px;
    /* overflow: scroll; */
    float: left;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgb(0, 21, 41);
}

.header .navigator .logo {
    height: 85px;
}

.header .banner {
    height: 40px;
    width: calc(100% - 262px);
    background-color: white;
    position: fixed;
    top: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 0 0 2px #ddd;
    z-index: 1;
}
.header .banner div:nth-child(1){
    margin-left: 15px;
}
.header .banner div:nth-child(2){
    margin-right: 30px;
}